This serie consists of 8 basic dimensions, however a wide model spectrum can be obtained with different motor types and high performance between 300 – 20,000 m³/h can be achieved.

Backward inclined winged fan rotors manufactured from galvanized metal plate have been statically and dynamically balanced according to UNI 1940 / G 6,3. Its absorption section manufactured from galvanized metal plate has been mounted on the mounting base and the roof and blow cones for vertical airflow have been manufactured from ABS (Acrilonitrile-Butadiene-Stirene), coated with ultraviolet protective film.

The motors are asynchronous and three phase version have been used and have been placed outside the air inlet. The protective side grid has been manufactured from galvanized metal plate conforming to UNI EN 294 and also supports the motor-wing-wheel group.

The TD series have been tested in the 400 °C/2 hour working limit and has a certain area of use, such as fire protection applications. Motors that are not suitable for fire protection applications:
- Eex-d IIB motors used in applications resistant to blasts, according to AMCA standard 99-041-86 C class
- 60 Hz frequency and/or special volt motors
- Motors with thermal protectors